5305-00-052-8248 SCREW,TAPPING Index 5305-00-052-8250 SCREW,CAP,SOCKET HEAD

National Stock Number:
5305-00-052-8249

Federal Supply Class:
5305

National Item Identification Number:
000528249

Description:
SCREW,CAP,SOCKET HEAD

Detail:
An externally threaded fastener whose threaded portion is of one nominal diameter. The head has an internal socket or multiple spline for use with an inserted driver. A locking feature may be incorporated in the design of the head or threads. Excludes items with bevel (conical) heads. See BOLT, INTERNAL WRENCHING. Excludes SCREW, SHOULDER; and SCREW, MACHINE.


Manufacturer Information:
MS16998-1396906MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M


Techincal Specification:
THREAD SERIES DESIGNATORUNF
NOMINAL THREAD DIAMETER0.138 INCHES
THREAD QUANTITY PER INCH40
THREAD CLASS3A
THREAD DIRECTIONRIGHT-HAND
THREAD LENGTH0.669 INCHES MINIMUM AND
0.700 INCHES MAXIMUM
FASTENER LENGTH0.719 INCHES MINIMUM AND
0.750 INCHES MAXIMUM
MATERIALSTEEL OVERALL
SURFACE TREATMENTCADMIUM AND
CHROMATE OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
HARDNESS RATING36.0 ROCKWELL C MINIMUM AND
45.0 ROCKWELL C MAXIMUM OVERALL
MINIMUM TENSILE STRENGTH160000 POUNDS PER SQUARE INCH
MINIMUM YIELD STRENGTH130000 POUNDS PER SQUARE INCH
HEAD STYLEFLAT CHAMFER
HEAD DIAMETER0.218 INCHES MINIMUM AND
0.226 INCHES MAXIMUM
HEAD HEIGHT0.134 INCHES MINIMUM AND
0.138 INCHES MAXIMUM
INTERNAL DRIVE STYLEHEXAGON
WIDTH ACROSS FLATS0.109 INCHES MINIMUM AND
0.111 INCHES MAXIMUM
SPEC/STD CONTROLLING DATA
MANUFACTURERS CODE96906
DEFINITIVE GOVERNMENT SPEC/STD REFERENCEMS16998-13


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